Define melting and diffusion

1.	Define melting and diffusion
Answer» Gaurav you are a nice student Melting, change of a\xa0solidinto a\xa0liquid\xa0when\xa0heat\xa0is applied. In a pure\xa0crystalline solid, this process occurs at a fixed\xa0temperature\xa0called the\xa0melting point; an impure solid generally melts over a range of temperatures below the melting point of the principal component.\xa0Amorphous (non-crystalline) substances\xa0such as\xa0glass\xa0or\xa0pitch\xa0melt by gradually decreasing in\xa0viscosity\xa0as temperature is raised, with no sharp transition from solid to liquid. \t\tDiffusion\xa0is the movement of particles from a high concentration to a low concentration. Brownian motion is the diffusion of many particles.\t\t\tMelting point\xa0is the temperature at which a\xa0solid\xa0changes its phase to become a\xa0liquid. The process is called melting.\t

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